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docs: clarify zoom in/out mathematics

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Explain that zoom out is the mathematical inverse of zoom in
(divide by 1.1 instead of multiply), making the operations
reversible.
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mow 2026-01-15 18:44:29 +01:00
parent 3726ea16de
commit 4cfb56de61
1 changed files with 2 additions and 2 deletions
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docs/usage.md
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@ -34,8 +34,8 @@ The footer shows your current position (e.g., "3 / 42").
| Key | Action | Description |
|:----------|:---------------------------|:------------------------------------------------------|
| `+` / `=` | Zoom in | Increase zoom by 10% |
| `-` | Zoom out | Decrease zoom by ~9% |
| `+` / `=` | Zoom in | Multiply zoom by 1.1 (increase by 10%) |
| `-` | Zoom out | Divide zoom by 1.1 (decrease by ~9%, inverse of zoom in) |
| `1` | Actual size (100%) | Display image at pixel-perfect 1:1 scale |
| `f` | Fit to window | Scale image to fit the window while preserving ratio |